Terminal device, base station device, and method
To efficiently control a cell using an allocated frequency band, a non-allocated frequency band, or a shared frequency band. A terminal device for communicating with a base station device includes a reception unit configured to receive higher layer signaling including a DS configuration for a frequency and information indicating whether a partial subframe is configured for a cell corresponding to the frequency. The reception unit is configured to assume that the DS is not to be transmitted in the partial subframe, in a case that the DS configuration includes a CSI-RS configuration and that transmission of the DS overlaps transmission of a PDSCH and/or an EPDCCH in the partial subframe, and to measure a reference signal received power and reference signal reception quality.
1. A terminal device comprising:
a receiver configured to receive higher layer signaling including first information associated with a measurement of a discovery signal (DS) for a carrier frequency and second information indicating whether a partial subframe is configured or not for a serving cell corresponding to the carrier frequency; and
a measurement controller configured to measure reference signal received power (RSRP) and reference signal received quality (RSRQ) based on channel state information reference signals (CSI-RS) included in the DS, wherein
the measurement controller is configured to assume that the DS including the CSI-RS is not transmitted in the partial subframe, if all conditions 1), 2) and 3) below are met:
1) the first information includes a configuration associated with a measurement for the CSI-RS,
2) the second information indicates that the partial subframe is configured, and
3) a transmission of the DS is overlapped with a transmission of a physical downlink shared channel (PDSCH) and/or an enhanced physical downlink control channel (EPDCCH) in the partial subframe.
2. The terminal device according to claim 1 , wherein
the carrier frequency is included in an unlicensed band for a licensed assisted cell using a frame structure type 3.
3. The terminal device according to claim 1 , wherein
the partial subframe is a subframe where the transmission of the PDSCH and/or EPDCCH starts from a middle of the subframe or ends prior to end of the subframe.
4. The terminal device according to claim 1 , wherein
if the measurement controller assumes that the DS including the CSI-RS is not transmitted in the partial subframe, the measurement controller does not measure RSRQ and RSRP based on the CSI-RS.
5. A base station device comprising:
a transmitter configured to transmit higher layer signaling including first information associated with a measurement of a discovery signal (DS) for a carrier frequency and second information indicating whether a partial subframe is configured or not for a serving cell corresponding to the carrier frequency, wherein
the transmitter is configured not to transmit the DS including channel state information reference signals (CSI-RS) in the partial subframe, if all conditions 1), 2) and 3) below are met:
1) the first information includes a configuration associated with a measurement for the CSI-RS,
2) the second information indicates that the partial subframe is configured, and
3) a transmission of the DS is overlapped with a transmission of a physical downlink shared channel (PDSCH) and/or an enhanced physical downlink control channel (EPDCCH) in the partial subframe.